You would think that to be true. Local MDC rents and provides john boats. During duck season, there is a boat at every spot for your use in pit blind areas. If you put a gas motor on them, it needs to have a tag on it. I suppose if you are from a state that does not tag outboards, you could be legal. But I have seen tickets written for it there.
And, if you are of age that needs it, they will check for boater safety card also. Depends on how pissy they are at the time.